活動中の私のカスタムアダプタ：
private static HashMap<Integer, Boolean> checkedMap;
private class MyMediaCursorAdapter extends ResourceCursorAdapter {
public MyMediaCursorAdapter(Context context, int layout, Cursor c) {
super(context, layout, c);
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
View view = super.newView(context, cursor, parent);
final RecordListItemCache cache = new RecordListItemCache();
cache.date = (TextView)view.findViewById(R.id.dateRecorded);
cache.checkBox = (CheckBox)view.findViewById(R.id.checkBoxView);
view.setTag(cache);
return view;
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
final RecordListItemCache cache = (RecordListItemCache)view.getTag();
final SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy HH:mm:ss");
final String dateString = sdf.format(cursor.getLong(cursor
.getColumnIndex(MediaStore.Audio.Media.DATE_ADDED))*1000);
final String displayName = cursor.getString(cursor
.getColumnIndex(MediaStore.Audio.Media.TITLE));
final int id = cursor.getInt(cursor
.getColumnIndex(MediaStore.Audio.Media._ID));
cache.checkBox.setOnCheckedChangeListener(null);
Boolean chk = checkedMap.get(id);
if (chk==null) {
cache.checkBox.setChecked(false);
} else {
cache.checkBox.setChecked(chk);
}
cache.checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
checkedMap.put(id, isChecked);
}
});
cache.checkBox.setText(displayName);
cache.date.setText(dateString);
}
}
final static class RecordListItemCache {
public CheckBox checkBox;
public TextView date;
public boolean checked;
}
同じアクティビティのonCreateで：
myMediaCursorAdapter = new MyMediaCursorAdapter(getApplicationContext(),
R.layout.multipledeleteview, audioCurosr);
setListAdapter(myMediaCursorAdapter);
そしてonClick：
public void onClick(View button) {
switch (button.getId()) {
case R.id.buttonDeleteMultiple: {
Collection<Integer> IDs = checkedMap.keySet();
for (Integer id : IDs) {
if (checkedMap.get(id)==true) {
RecorderUtils.delete(getApplicationContext(), id, false);
}
}
checkedMap = new HashMap<Integer, Boolean>();
}
case R.id.buttonDeleteMultipleChooseAll: {
int size = myMediaCursorAdapter.getCount();
ListView lv = getListView();
for(int i = 0; i <= size; i++) {
lv.setItemChecked(i, true);
}
myMediaCursorAdapter.notifyDataSetChanged();
}
}
}
削除は正常に機能しています（チェック済みのものを削除します）。しかし、すべてを選択するためのボタンは何も変更しません。